ruby-debug-ide fails to install on Ubuntu with Ruby 2.0 - ruby

Question

I'm not sure why, but I had no issues installed ruby-debug-ide for the past several months in my Ubuntu VM (running with Vagrant/Virtualbox). Today, I did a vagrant destroy then a vagrant up and all of a sudden I'm getting this new issue.
All other developers with similar issues & solutions have not given me any solutions that work for my installation. I don't know what to do at this point. Help please!
almsgive#almsgive-box:~$ gem install ruby-debug-ide
Building native extensions. This could take a while...
ERROR: Error installing ruby-debug-ide:
ERROR: Failed to build gem native extension.
/usr/local/rvm/rubies/ruby-2.0.0-p576/bin/ruby mkrf_conf.rb
Installing base gem
Building native extensions. This could take a while...
Building native extensions. This could take a while...
ERROR: Failed to build gem native extension.
/usr/local/rvm/rubies/ruby-2.0.0-p576/bin/ruby extconf.rb
checking for vm_core.h... no
checking for vm_core.h... no
Makefile creation failed
**************************************************************************
No source for ruby-2.0.0-p576 provided with debugger-ruby_core_source gem.
**************************************************************************
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers. Check the mkmf.log file for more details. You may
need configuration options.
Provided configuration options:
--with-opt-dir
--without-opt-dir
--with-opt-include
--without-opt-include=${opt-dir}/include
--with-opt-lib
--without-opt-lib=${opt-dir}/lib
--with-make-prog
--without-make-prog
--srcdir=.
--curdir
--ruby=/usr/local/rvm/rubies/ruby-2.0.0-p576/bin/ruby
--with-ruby-dir
--without-ruby-dir
--with-ruby-include
--without-ruby-include=${ruby-dir}/include
--with-ruby-lib
--without-ruby-lib=${ruby-dir}/
extconf failed, exit code 1
Gem files will remain installed in /usr/local/rvm/gems/ruby-2.0.0-p576/gems/debase-0.0.9 for inspection.
Results logged to /usr/local/rvm/gems/ruby-2.0.0-p576/extensions/x86_64-linux/2.0.0/debase-0.0.9/gem_make.out
/usr/local/rvm/rubies/ruby-2.0.0-p576/lib/ruby/site_ruby/2.0.0/rubygems/ext/builder.rb:89:in `run'
/usr/local/rvm/rubies/ruby-2.0.0-p576/lib/ruby/site_ruby/2.0.0/rubygems/ext/ext_conf_builder.rb:38:in `block in build'
/usr/local/rvm/rubies/ruby-2.0.0-p576/lib/ruby/2.0.0/tempfile.rb:324:in `open'
/usr/local/rvm/rubies/ruby-2.0.0-p576/lib/ruby/site_ruby/2.0.0/rubygems/ext/ext_conf_builder.rb:17:in `build'
/usr/local/rvm/rubies/ruby-2.0.0-p576/lib/ruby/site_ruby/2.0.0/rubygems/ext/builder.rb:161:in `block (2 levels) in build_extension'
/usr/local/rvm/rubies/ruby-2.0.0-p576/lib/ruby/site_ruby/2.0.0/rubygems/ext/builder.rb:160:in `chdir'
/usr/local/rvm/rubies/ruby-2.0.0-p576/lib/ruby/site_ruby/2.0.0/rubygems/ext/builder.rb:160:in `block in build_extension'
/usr/local/rvm/rubies/ruby-2.0.0-p576/lib/ruby/site_ruby/2.0.0/rubygems/ext/builder.rb:159:in `synchronize'
/usr/local/rvm/rubies/ruby-2.0.0-p576/lib/ruby/site_ruby/2.0.0/rubygems/ext/builder.rb:159:in `build_extension'
/usr/local/rvm/rubies/ruby-2.0.0-p576/lib/ruby/site_ruby/2.0.0/rubygems/ext/builder.rb:198:in `block in build_extensions'
/usr/local/rvm/rubies/ruby-2.0.0-p576/lib/ruby/site_ruby/2.0.0/rubygems/ext/builder.rb:195:in `each'
/usr/local/rvm/rubies/ruby-2.0.0-p576/lib/ruby/site_ruby/2.0.0/rubygems/ext/builder.rb:195:in `build_extensions'
/usr/local/rvm/rubies/ruby-2.0.0-p576/lib/ruby/site_ruby/2.0.0/rubygems/installer.rb:677:in `build_extensions'
/usr/local/rvm/rubies/ruby-2.0.0-p576/lib/ruby/site_ruby/2.0.0/rubygems/installer.rb:232:in `install'
/usr/local/rvm/rubies/ruby-2.0.0-p576/lib/ruby/site_ruby/2.0.0/rubygems/request_set.rb:142:in `block in install'
/usr/local/rvm/rubies/ruby-2.0.0-p576/lib/ruby/site_ruby/2.0.0/rubygems/request_set.rb:126:in `each'
/usr/local/rvm/rubies/ruby-2.0.0-p576/lib/ruby/site_ruby/2.0.0/rubygems/request_set.rb:126:in `install'
/usr/local/rvm/rubies/ruby-2.0.0-p576/lib/ruby/site_ruby/2.0.0/rubygems/dependency_installer.rb:389:in `install'
mkrf_conf.rb:34:in `rescue in <main>'
mkrf_conf.rb:27:in `<main>'
rake failed, exit code 1
Gem files will remain installed in /usr/local/rvm/gems/ruby-2.0.0-p576/gems/ruby-debug-ide-0.4.22 for inspection.
Results logged to /usr/local/rvm/gems/ruby-2.0.0-p576/extensions/x86_64-linux/2.0.0/ruby-debug-ide-0.4.22/gem_make.out

Answer 1

I had the same problem today with debugger-ruby_core_source (by way of debugger, not ruby-debug-ide). I changed my ruby version back to 2.0.0-p481. After that debugger-ruby_core_source installed as expected.